add talk videos from Kun Zhang, Yujia Zheng, and Johannes Textor (#25) #54

	name: Build and deploy GitHub Pages

	on:
	push:
	branches:
	- main
	pull_request:
	branches:
	- main

	jobs:
	build:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v3

	- name: Setup Ruby
	uses: ruby/setup-ruby@v1
	with:
	bundler-cache: true

	- name: Build site
	run: \|
	bundle exec jekyll build

	- name: Upload GH Pages Artifact
	if: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' }}
	uses: actions/upload-pages-artifact@v2
	with:
	path: ./_site

	deploy:
	runs-on: ubuntu-latest
	if: ${{ github.repository == 'py-why/py-why.github.io' && github.event_name == 'push' && github.ref == 'refs/heads/main' }}
	needs: build

	# Grant GITHUB_TOKEN the permissions required to make a Pages deployment
	permissions:
	pages: write # to deploy to Pages
	id-token: write # to verify the deployment originates from an appropriate source

	# Deploy to the github-pages environment
	environment:
	name: github-pages
	url: ${{ steps.deployment.outputs.page_url }}

	steps:
	- name: Deploy
	uses: actions/deploy-pages@v3

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